NASHVILLE, Tenn. (AP) _ The National Transportation Safety Board is investigating how much of a factor dense fog may have been in a plane crash at the Nashville International Airport that killed one person.

The Cessna 172 single-engine plane crashed sometime in the early-morning hours after 3 a.m. CDT on Tuesday. But the crash apparently wasn't reported until a pilot in another plane saw the wreckage around 8:45 a.m.

Air safety investigator Jay Neylon told reporters at a news conference on Wednesday that it was very dense around that time, ``and that's one thing we will look at closely.''

He said investigators plan to listen to air traffic control tapes to determine whether there was any communication between the control tower and the pilot, who was the only one aboard the plane and has not been identified.